the first key messenger michelle obama checked out the arena this afternoon in advance of her speech tomorrow night. other key speakers include san antonio's mayor castro, massachusetts candidate elizabeth warren and former president bill clinton. all have their remarks aimed at key democratic constituencies. >> the obama campaign got another convention headache earlier this morning when the chairman of the california democratic party publicly compared paul ryan to nazi propagandaist joseph goebbels. the romney campaign took offense and called for a full repudiation of the remarks. the obama campaign did repudiate the remarks but did not call on mr. burton the chairman of the california party to resign. kate? >> chuck todd in north carolina tonight. >>> president obama spent this holiday on the campaign trail with a stop in a key swing state today before moving on to see flood damage in louisiana. kristen welker is traveling with the president and joins us from new orleans. good evening, kristen. >> reporter: good evening, kate. we are in new orleans where president obama took a deto